Added dummy microservice files

books/Book.js

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+const mongoose = require('mongoose')
+
+mongoose.model("Book", {
+  title: {
+    type: String,
+    required: true
+  },
+  author: {
+    type: String,
+    required: true
+  },
+  numberPages: {
+    type: Number,
+    required: false
+  },
+  publisher: {
+    type: String,
+    required: false
+  }
+})
+

books/Dockerfile

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+FROM node:10
+WORKDIR /bookContainer/
+COPY package*.json ./
+RUN npm install
+COPY . .
+EXPOSE 4545
+CMD ["node", "books.js"]

books/books.js

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+const express = require("express");
+const app = express();
+const mongoose = require('mongoose');
+const bodyParser = require('body-parser');
+app.use(bodyParser.json());
+const path = require('path');
+
+const mw = require("../mwMongo.js");
+app.use("/", mw.microCom(path.basename(__filename)));
+
+//Required to get rid of deprecation warnings
+mongoose.set("useUnifiedTopology", true);
+mongoose.set("useNewUrlParser", true);
+
+require('./Book')
+const Book = mongoose.model("Book")
+
+//Connects our bookservice db to cloud db
+mongoose.connect("mongodb+srv://numanzor:Nu121692.@microservice-tutorial-hq75f.mongodb.net/booksservice", () => {
+  console.log("Books database is connected...")
+});
+
+app.get('/', (req,res,next) => {
+  return res.status(200).send("This is our main endpoint!");
+})
+
+
+//Create functionality
+app.post('/book', (req,res,next) => {
+  const newBook = {
+    title: req.body.title,
+    author: req.body.author,
+    numberPages: req.body.numberPages,
+    publisher: req.body.publisher
+  }
+  //create a new Book with the above attributes
+  const book = new Book(newBook)
+
+  //save our book to collection
+
+  book.save().then(() => {
+      res.send("Book successfully saved to the database");
+      next();
+    })
+    .catch(err => {
+      Promise.reject(err);
+    });
+})
+
+
+app.get('/books', (req, res,next) => {
+  Book.find().then((books) => {
+    res.json(books)
+    next();
+  }).catch((err) => {
+    Promise.reject(err)
+  })
+})
+
+//Get a book by its id
+app.get('/book/:id', (req,res,next) => {
+  Book.findById(req.params.id)
+    .then((book) => {
+      if (book) {
+        res.json(book)
+        next();
+      } else {
+        Promise.reject(err);
+      }
+    })
+})
+
+
+app.delete('/book/:id', (req,res,next) => {
+  Book.findOneAndRemove(req.params.id)
+    .then(() => {
+      res.send('Book successfully deleted')
+      next();
+    }).catch((err) => {
+      if (err) {
+        throw err;
+      }
+    })
+  })
+
+//Open an express server
+app.listen(4545, () => {
+  console.log('Book server running on port 4545 ...');
+})